Radial-flow steam-turbine



K. BAUMANN.

RADIAL FLOW STEAM TURBINE.

. APPUCATION FILED SEPT 29, 1917,

1,375,076. Patented Apr. 19, 1921.

2 SHEETS-SHEET INVENTOR.

Y oat/W A TTORNEYS.

Fig.2.

K. BAUMANN.

RADIAL FLOW STEAM TURBINE.

APPLICATION FILED-SEPT. 29. 1917.

Patented Apr. 19, 1921.

2 SHEETSSHEET 2- A TTORNEYS.

UNITEDSTATES PATENT OFFICE,

KARL BAUMANN, OF URMSTON, ENGLAND, ASSIGNOB TO WESTINGHOUSE ELECTRIC &

MANUFAGTURING 00., A CORPORATION OF PENNSYLVANIA. I

RADIAL-FLOW STEAM-renews To all whom it may concern Be it known that I, KARL BAUMANN, a citizen of the confederation of Switzerland, and a resident of Urmston, in the county of Lancaster, England, have made anew and useful Invention in-yRadial-Flow Steam- Turbines, of which the following is a specification. t A I This invention relates to steamturbine exhaust casings of the kind set forth in the specification of my prior'application for Letters Patent Serial No. 123,697 filed October 4th, 1916, for steam turbines, the imroved construction of turbine exhaust casmg therein set forth being described and shown as applied to turbines of the axial flow type.

According to the present invention, which is a modification of that set forth in the aforesaid prior application, the improved construction of v turbine exhaust casing is adapted for use with radial'flow'turbines of which the now well known Ljungstrom turbine is an example.

In applying the improved exhaust casing to such a turbine the curved guide or guides for deflecting the steam leaving the turbine outwardly into an approximately radial direction of flow are unnecessary and are therefore, in accordance with this invention, omitted, but in other respects the exhaust casing is constructed as described and shown in the aforesaid prior application in which the guide walls in conjunction with the inclosing walls of the exhaust casing form passages for'conducting the segmental portions into which the steam leaving the turbine is thereby divided to the exhaust .outlet of the turbine.

In the accompanying drawing is illustrated a Ljungstrom steam turbine provided with an exhaust casing of the kind hereinabove indicated, modified in accordance with the present invention, Figure 1 being a central, longitudinal vertical section, and Fig. 2 a section taken at right angles to that of Fig. 1. 7 7 e In the drawing the final ring of turbine blades is shown at 3 and the steam supply pipes at 4, 4e. The'turbine shaft 5 is supported in bearings 6. b

The exhaust casing? surrounds the last ring of blades 8 and, as in the construction described in the specification of the main patent, is provided with a plurality of in- Specification of Letters Patent. Patented Apr. 19, 1921. Application filed September 29, 1917. serieine 194,056.

ternal guide walls 8 which inconjunction with the'side wall 7 and end wal1s'9, 10

of the exhaustcasing form separate passages which severally conduct segmental portions of steam leaving the blade ring 3'to the outlet 11 of the exhaust casing. 'The exhaust casing is preferably provided at either end with supporting feet 12,13 from which the turbine, and also the condenser '14, may be supported in position from the foundations. Thefeet 12, 13 here illustrated are similar in all respects to those described in the s'pecification of the main patent above referred to.

With an exhaust casing iconstructed as above described and illustrated the steam leaving the last ring of blades 3 will be 'di- "vided by the internal guide walls 8' into separate segmental portions andthese separate portions ofsteam will respectively flow through the passages formed by said internal guide walls 8 and the inclosing side and end walls-of the exhaust casing until they reach the exhaust outlet 11 where all of said portions of steam will be flowing in substantially the same direction and will be distributed uniformly over the condensing surface of the condenser.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. The combination with a radial. flow turbine, a condenser disposed at one side of the turbine, and a series of diaphragms forming exhaust passages opening radially at the periphery of the last row of blading and leading to different points along the condenser whereby steam exhausting from definite points of the periphery is conducted to definite points along the condenser.

2. In combination with a radial flow turbine, a condenser disposed at one side of the turbine, and an exhaust casing surrounding the periphery of the turbine blading, provided with diaphragms dividing the easing into a plurality of passages, each adapted to receive steam exhausted radially from a definite segment of the blading periphery and conduct it to a definite point along the condenser, the said diaphragms being so arranged that steam exhausting from the entire periphe of the blading is uniformly distributed a ong the condenser.

3. In combination with a radial flow turbine exhausting steam radially from the blading, a condenser disposed at one side of the turbine, an exhaust casing enshrouding the exhaust openings ofthe 'blading provided with .aplurality of diaphragms di vidlng the easing into separate passages having their inlets arranged side by side 7 opening radially of the turbine axis, a condenser disposed atone side of the turbine and a series of exhaust passages opening radially at the periphery of the wblading and leading to different points along; the con- 1 denser whereby steam exhausting from definite points of the periphery is conducted to definite points along the condenser. V

5. In combination with a radial-flow turbine, a condenser disposed atone side of the turbine and transversely oftheturbine axis,

and an exhaust casing surrounding the turbine and provided With'a plurality of diaphragms dividing the easing into separate passages having their inlets arranged side by side about the entire periphery of the blading and extending to, the condenser to distribute the steam therealong.

6. In combination with a radial-fiow turbine, an exhaust easing surrounding the turbine and having a discharge end arranged at one side of the turbine axis, said casing 7 having diaphragms .dividing segmentally the radial di'schargeofsteam from the turbine and being curved so as to extend in sub stantially the same general direction and affording a reinforcement for the casing, supporting feet disposed at opposite sides of the caslng, and a condenser communicat ing with the discharge end of the exhaus casing.

7. In combination vwith a radial-flow'turbine, an exhaust casing surrounding the turbine and having a discharge end arcasing having diaphragmsj' dividing segmentally the radial discharge of steam from the turbine and being curved so as to extend in substantiallythe same general direction and I aiiording a reinforcement .for the casing, supporting feet disposedatopposite sides of the casing, and a'oondenser communicating with the discharge end of the exhaust casing. and supported therebyj In testimony whereof, I have hereunto ranged at one .side of the turbine'axis, said I subscribed my name this sixth dayo fSep Em T 7 V vKARL BAUMANN. 'Witnesses; JAMES HU'rToN, WILrREnMoRRIs.

tember, 1917. 

